0
When deriving the equation of escape velocity why do we assume that the kinetic energy of an object at infinity is zero?
"Escape velocity" is the speed with which an object would have to leave Earth in
order for gravity to never pull it back. That means that even though Earth's gravity
keeps slowing it and slowing it and slowing it, it never slows to zero. At any
distance from Earth, the object is still moving away. It would only run out of gas
and stop when it got infinitely far away from Earth.
In order to calculate the escape velocity, we simply play that video backwards. We
place the object at 'infinity', let go of it, let Earth's gravity get ahold of it and pull
it all the way in, and we calculate how fast it's going when it hits the ground. It's not
a very difficult calculation, because gravity and distance are so easy to work with.
If we let the object have some kinetic energy before the Earth got ahold of it and
it started falling in, then we'd wind up with a number that's slightly wrong.
What else can I help you with?
If you have a kinetic energy of 45 j and your mass is 30kg then what is your velocity?
To find the velocity, you can use the equation for kinetic energy: KE = 0.5 * mass * velocity^2. Rearranging the equation gives 45 = 0.5 * 30 * velocity^2. Solving for velocity gives velocity = √(2 * 45 / 30) = √3 = approximately 1.73 m/s.
What is the equation for mechanical power?
Mechanical power is typically calculated as the product of force and velocity, or torque and angular velocity. The equation for mechanical power can be expressed as P = Fv or P = τω, where P is power, F is force, v is velocity, τ is torque, and ω is angular velocity.
How does velocity have an effect on kinetic energy?
The summation of potential and kinetic energy of an object is constant. When the potential energy of an object decreases the kinetic energy increases. Assume a falling stone from some high point above ground. At the beginning, the potential energy is maximum while the kinetic energy is minimum or zero. While the stone is falling, the kinetic energy increases while the potential energy increases (with the summation of both is constant). When the stone reaches the ground, the kinetic energy is maximum and the potential energy is zero.
Does the velocity of an object influence kinetic energy more that an objects weight?
Yes, because the equation is KE = 1/2(m)(v2). The velocity is squared, so it makes more of a difference.
How does kinetic energy relate to potential energy?
Think of potential energy as stored energy, and kinetic energy as energy that puts an object in motion (i.e., increases the magnitude of velocity). In general you can set them equal to each other, to for example determine the velocity an object will be atLet U = kinetic energy and K = kinetic energyU = mgh (mass, gravity, height)K = (1/2)mv2 (mass, velocity)If you set U and K equal to each other.U = Kmgh = (1/2)mv2masses cancel out leaving you withv2= 2gh (or about 20h)The higher an object is from the surface of the ground, the more potential energy it has. Looking at the equation I listed, you can see velocity get's higher as height increases. The velocity in this equation is what velocity it would be at the instant the object hit the surface.
Where velocity is squared in the kinetic energy equation doubling an object's velocity will do what to its kinetic energy?
Multiply it by 4 (4 = 22)
What is the kinetic energy of the jeepney?
The kinetic energy of a jeepney depends on its mass and velocity. The kinetic energy equation is KE = 0.5 * mass * velocity^2. Given the mass and velocity of the jeepney, the kinetic energy can be calculated using this formula.
Which is the correct equation for kinetic energy?
Kinetic Energy = (1/2) x (Mass) x (Velocity)2
What happens to an objects kinetic energy when the velocity is doubled?
When an object's velocity doubles, its kinetic energy increases by a factor of four. This relationship is described by the kinetic energy equation, which states that kinetic energy is directly proportional to the square of an object's velocity.
You can calculate kinetic energy by using the equation what?
KE=1/2*m*v2whereKE is kinetic energym is the massand V is the velocity
What equation use for kinetic energy?
The equation for kinetic energy is KE = 0.5 * m * v^2, where KE represents the kinetic energy, m is the mass of the object, and v is its velocity. This equation shows that kinetic energy is directly proportional to the mass of the object and the square of its velocity.
If you have a kinetic energy of 45 j and your mass is 30kg then what is your velocity?
To find the velocity, you can use the equation for kinetic energy: KE = 0.5 * mass * velocity^2. Rearranging the equation gives 45 = 0.5 * 30 * velocity^2. Solving for velocity gives velocity = √(2 * 45 / 30) = √3 = approximately 1.73 m/s.
The equation for kinetic energy is .?
KE=1/2mv2Kinetic Energy = 1/2 (mass X final velocity)2
How is the relation between kinetic energy and momentum explained in physics?
In physics, the relationship between kinetic energy and momentum is explained by the equation: Kinetic Energy 0.5 mass velocity2 and Momentum mass velocity. This shows that kinetic energy is directly proportional to the square of velocity, while momentum is directly proportional to velocity.
If the speed is tripled the kinetic energy will .?
If the speed is tripled, the kinetic energy will increase by a factor of 9. This relationship is based on the equation for kinetic energy, which is proportional to the square of the velocity.
What is the relationship between an object's mass, velocity, and translational kinetic energy?
The relationship between an object's mass, velocity, and translational kinetic energy is described by the equation: Kinetic energy 0.5 mass velocity2. This means that the kinetic energy of an object is directly proportional to both its mass and the square of its velocity. In other words, as the mass or velocity of an object increases, its translational kinetic energy also increases.
What two things dose kinetic energy depend on?
kinetic energy depends in two things POO and a STICK so kinetic energy is just POO on a stick
